I have the Sony 370 now relegated to the bedroom due to the purchase of the Panasonic 500.

The Panasonic picture / colours / sound is far superior. And motion handling is nigh on perfect compared to the 370, which I didnt think handled fast scenes particularly well. Harry Potter films when playing Quidich was a particular good example of this.

I agree Blu Ray playback is very similar whatever the player but its the finer details that win it over the 370 for me. Detail is excellent on the 500.

The remote swipe pad is awful though (although some people get it - I dont) and the menu system on the Sony is far slicker.